Species Richness in Italian Seas

submitted by: Giulio_Relini
The SIBM (Italian Society for Marine Biology) has been entrusted by Italian Ministry of Environment to revise and to update the checklist of Italian marine species. Calderini's checklist (1993-95) recorded some 57,000 species belonging to Italian fauna of which 9,309 marine species. The updating process was completed in 2005 and is currently available for consultation both on the SIBM website ( www.sibm.it ) and on the Ministry of Environment database. A further checklist of Macrophyta,...

Temporal change in population structure and genetic diversity of alvinocarid shrimp that rapidly recolonize an actively erupting submarine volcano.

submitted by: John_Sherrin
Deep-sea hydrothermal vents are isolated, short-lived habitats with dynamic biological communities. An extreme case of vent habitat occurs on NW Rota, an active submarine volcano in the Mariana Arc. Explosive volcanism observed since 2003 and mass-wasting create a highly volatile environment for the shrimp Opaepele loihi- one of only two abundant species present. The goal of this study was to infer spatio-temporal changes in the genetic diversity of O. loihi and to determine its recruitment...

Food web organization of Posidonia oceanica invertebrate community in fragmented and no-fragmented sites.

submitted by: Edoardo_Calizza
Posidonia oceanica ((L.) Delile, 1813) meadows play a fundamental role on biodiversity organization. Despite the causes are complex and still discussed, P. oceanica meadows are experiencing a fragmentation process, particularly on coastal areas. In this study we addressed the effect of meadow fragmentation on detritus associated macroinvertebrates  abundance and diversity and on the structure of detritus based food webs by comparing a no-fragmented portion of the meadow with a fragmented...

Rock boring by the bivalve Petricola dactylus increases invertebrate richness in a wave-swept Patagonian intertidal environment

submitted by: María_Bagur
Boring invertebrates increase bedrock topographical complexity and overall habitat diversity. Intertidal Petricola dactylus burrows persist after bivalve death, infill with sediments, and provide habitat to other species in otherwise flat limestone surfaces that are subject to intense wave splash. Here, we analyzed if vacant burrows of the bivalve P. dactylus increase invertebrate richness in a Patagonian intertidal limestone outcrop. Areas with and without burrows were compared by...

Biodiversity of coral associations of the scallop Pedum spondyloideum (Bivalvia, Pteriomorphia, Pectinidae) and comparison between the Red Sea and the "Coral Triangle".

submitted by: Patrick_Scaps
The nestling and facultatively boring pectinid bivalve Pedum spondyloideum (Gmelin, 1791) is an obligate associate of living scleractinian corals that occurs in the Indo-Pacific. It attaches byssally and lives embedded in the coral skeleton. In order to enhance the understanding of the nature of associations between Pedum and its scleractinian host corals recent field surveys have been conducted in the north Red Sea and in different areas of the ‘Coral Triangle'. These studies have shown...

Diel variation of small jellyfish over a shallow coral-reef in Redang Island, Malaysia

submitted by: Ryota_Nakajima
Jellyfish abundance and composition were investigated at three-hour intervals for a 48-hour period from a fringing reef of Redang Island, Malaysia. The abundance of jellyfish in the water column was significantly higher during the night, being 2.2 times as high (90 ± 87 indiv. m-3) as during the day (40 ± 111 indiv. m-3). The jellyfish community was dominated by the calycophoran siphonophore Diphyes chamissonis, constituting 80.1% of the total jellyfish abundance, followed by Aglaura...